[TowerTalk] copperweld wire was:remote tuner Vs lumped constants

[Randy]

i helped erect a dipole at the local Field Day once..
I couldn't help but notice some bumps along the way-- some of the 
strands had
"blobbed over"-- melted due to, presumably, lightning strike(s).
Must have been copperweld or an equivalent-- copper would have just puddled
up and parted.

Saying things, one way or the other, is probably like saying things good 
or bad about
"RG-8"... lots o' variants out there.

73
Randy
KZ4RV

On 7/25/2013 12:11 PM, john at kk9a.com wrote:
> I had very poor luck using stranded copperweld wire at my home in Aruba.
> It was used for temporary contest low band antennas and it was stored
> inside 90% of the time.  The steel wire became very brittle and even when
> using great care strands would break when trying to set it up. Eventually
> I replaced some of the copperweld wire and a year later the same problems
> developed.  Perhaps solid copperweld holds up better however it is more
> difficult to work with. I had no problems, not even stretching, with
> antennas made from 14ga solid thhn.
>
> John P40A
>
> To:	towertalk at contesting.com
> Subject:	 Re: [TowerTalk] remote tuner Vs lumped constants
> From:	 Jim Lux <jimlux at earthlink.net>
> Date:	 Thu, 25 Jul 2013 06:23:23 -0700
>
> On 7/24/13 8:59 PM, K8RI wrote:
> On 7/24/2013 11:34 PM, Gene Fuller wrote:
> I don't understand the problem with copperweld.  I have three 160 meter
> quarterwave slopers and three 80 meter bent vertical dipoles using
> alumoweld that have been up about 40 years with no problems. As I recall
> it is 20% aluminum.
> Gene / W2LU
>
>
> What I had appeared to just be copper plated steel. It was listed as
> CopperWeld. Whether it was the real stuff?
>
> I see the definition as "hard drawn Copper welded to a steel core"
>
>
>
> There's several flavors of this clad steel wire..
> Copperweld is a tradename for one mfr. http://fushicopperweld.com/
> (history is here http://fushicopperweld.com/en/about/history.html)
>
> There's many flavors of clad wire..
> There's copper clad steel (CCS) which is what is traditional for antennas
> and rural powerlines, but there's also aluminum over steel (used for power
> lines) and copper over aluminum.
>
> The cladding thickness varies. You'll see 21%, 30%, and 40% IACS
> (conductivity relative to a pure copper wire of the same diameter)
>
> For 10AWG diameter (0.1019") the cladding is
> 21% IACS 0.0776 mm
> 30% IACS,0.1812 mm
> 40% IACS,0.2588 mm
>
> Skin depth at 10 MHz in copper is 0.021 mm, so even 21% IACS CCS has more
> than 3 skin depths.. Go down to 80m where skin depth is more like 0.035mm,
> and you might want to consider one of the othes.
>
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